cdf
Returns the cumulative distribution function value at x for this Pareto distribution.
For x ≥ scale: 1 - (xm/x)^α. Returns 0 for x < scale. Computed via −expm1(α·ln(xm/x)) to avoid catastrophic cancellation when x ≈ scale.
Return
the probability that a value is less than or equal to x, in the range [0, 1].
Parameters
x
the point at which to evaluate the cumulative probability.